I'm thinking over-the-head, probably closed-cup but open-minded about open-cup.
I currently own these Audio-Technica ATH-PRO5 ones (or very similar) which sound awesome and have been a right treat, except for the fact that the ear pads are now flaking apart and any time I use them I end up with little black bits of plastic around my ears which is quite annoying. The pads can't be replaced unfortunately.
http://www.amazon.co.uk/Technica-ATH-PR ... 405&sr=8-1

So, any tips from anyone? I was lucky to get those AT ones for about £30-35, but I'd be willing to spend more like their full price of £60.